Was thinking about the lane draw.
The draw itself stays the same, just the team numbers change each year. So we work out 10 years of the first round to suit rivalry, number the teams to suit each year, and the lane draws are done forever until such time as we get a new centre in the competition.
In fact, I just worked it out. Each team plays as each number in the draw over the next 10 years and the rivalry round is always round 1.
The draw itself stays the same, just the team numbers change each year. So we work out 10 years of the first round to suit rivalry, number the teams to suit each year, and the lane draws are done forever until such time as we get a new centre in the competition.
In fact, I just worked it out. Each team plays as each number in the draw over the next 10 years and the rivalry round is always round 1.